Wood Burning Pollution Linked to 8,600 Premature US Deaths Annually
Air pollution from residential wood burning is estimated to cause 8,600 premature deaths in the United States every year, according to a recent study. While only 2% of US homes use wood as their primary heating source, and an additional 8% burn wood for pleasure or supplementary heating, these activities collectively produce 21% of the country's wintertime particle pollution.
Urban Impact and Environmental Justice Concerns
Contrary to common assumptions, the research highlights that wood burning pollution significantly affects populations in many large US cities, not just rural areas. Professor Daniel Horton of Northwestern University, who led the study, noted, "We frequently hear about the negative health impacts of wildfire smoke, but we rarely consider the consequences of burning wood to heat our homes."
Kyan Shlipak, the study's first author, expressed surprise at the findings, stating, "I was shocked by the percentage of particle pollution coming from residential wood burning. We had the preconceived notion that it was predominantly a rural phenomenon, but we found it has a substantial impact on urban and suburban populations."
The study divided the continental US into 839,000 grid squares to calculate hourly pollution levels, revealing that particle pollution spreads from suburbs with high burning rates to densely populated city areas. This raises environmental justice issues, as Shlipak explained, "Although people of colour burn less wood, they experienced higher exposure and greater harms from wood-burning pollution," compounded by existing health inequalities.
Geographical Factors and Climate Influences
Wood burning pollution is not limited to cold regions; it also affects places with warm climates, such as Los Angeles, due to cold night-time temperatures. In some areas, pollution is trapped locally by geographical features like valleys and mountains, including the Rocky Mountains west of Denver, the Cascade Range east of Seattle, and the San Gabriel mountains north of Los Angeles.
UK Parallels and Rising Trends
Similar negative health effects are observed in the UK, where air pollution from residential wood and coal burning contributes to nearly 2,500 avoidable deaths annually. A recent study in Wales found that heating with wood stoves or fireplaces tripled particle pollution exposure for children at home.
Analysis of 26 million home energy performance certificates indicates that 10.4% of homes in England and Wales had wood heating in 2024, with numbers increasing. The charity Global Action Plan estimates that if current trends continue, nearly 1 million wood-burning stoves could be installed in the UK during the current parliamentary term.
The highest density of wood stoves and fireplaces is in urban areas outside major cities, such as Worthing, Norwich, Reading, Cambridge, and Hastings. This heating method is more common in wealthier neighbourhoods but affects broader areas, prompting environmental justice questions. The UK government is now consulting on health warnings for new stoves and solid fuels.
Call for Cleaner Alternatives
Professor Horton emphasized the potential for improvement, saying, "Only a small number of homes rely on wood burning for heat. Facilitating a transition to cleaner burning or non-burning heat sources could lead to outsized improvements in air quality." This underscores the need for policy changes and public awareness to mitigate the health risks associated with residential wood combustion.
